\documentclass[10pt]{article}

\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{pstricks,pst-eps}

\pagestyle{empty}

\begin{document}
\begin{TeXtoEPS}


  \begin{pspicture}(-3,-3)(4.5,3)
    \psline[linestyle=dashed](-3,2.5)(4,2.5)
    \psline[linestyle=dashed](-3,1)(4,1)
    \psline[linestyle=dashed](-3,-1)(4,-1)
    
    \psline[arrows=o-o](-2,2)(-1,0)
    \psline[arrows=o-o](0.8,2.5)(0.8,-2.5)
    \psline[arrows=*-*](0.8,1)(0.8,-1)

    \uput[d](2.8,2.5){$\mathcal{T} = \{\{s_1\}\}$}
    \uput[d](2.8,1){$\mathcal{T} = \{\{s_3\}, \{s_1,s_2\}\}$}
    \uput[d](2.8,-1){$\mathcal{T} = \{\{s_1,s_2\}\}$}

    \uput[l](0.8,2){$s_1$}
    \uput[l](0.8,0){$s_2$}
    \uput[l](-2,2){$s_3$}
  \end{pspicture}

\end{TeXtoEPS}
\end{document}
